LawnMaster
Drive Gearbox Seal Failure
Robot mower is leaking oil or grease from the wheel area onto the lawn.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Worn drive gearbox seals, Cracked gearbox housing, Overfilled or incorrect lubricant used in gearbox, Impact damage to wheel hub
How to Fix / Troubleshooting
Safety first: Turn OFF the mower and disconnect the battery before removing wheels.
- Remove affected wheel: Take off the wheel to inspect the drive gearbox housing.
- Clean area: Wipe away leaked lubricant to identify the source.
- Check housing: Look for cracks or damage around the gearbox output shaft.
- Avoid operation: Do not continue using the mower with a leaking gearbox, as it may seize and damage the drive motor.
Drive gearboxes on LawnMaster robot mowers are typically sealed units. Replace the complete drive motor/gearbox assembly on the leaking side.
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Repair Difficulty
Hard
4/5
Required Part
Drive Motor Assembly
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